For the explanation of levels A, B and C see IPC 2221 paragraph 1.6.3 Regards, Ramon > -----Original Message----- > From: Dehoyos, Ramon > Sent: Monday, May 19, 2003 8:30 AM > To: [log in to unmask] > Subject: Re: [TN] Lead:Hole Ratio and Annular Ring Size > > Al: > Check IPC 2222 paragraph 9.2.2 and Table 9-3 > Regards, > Ramon > > > -----Original Message----- > > From: [log in to unmask] [SMTP:[log in to unmask]] > > Sent: Friday, May 16, 2003 10:50 AM > > To: [log in to unmask] > > Subject: [TN] Lead:Hole Ratio and Annular Ring Size > > > > Hello Technetters, > > > > I'm looking for industry specs (or just other technetters experience) on > > lead:hole ratio and annular ring (pad) size when using pth dc converters > > (Lucent, Tyco, Ericsson, etc.) that have lead diameters that are .040", > > .062", .080, and/or .180". > > > > Does the standard .015"-.017" lead:hole ratio still apply to these large > > leads? And should the pad size increase linearly with the increase in > > lead > > diameter? > > > > Thanks in advance as always, > > > > See some of you at NEPCON East? > > > > Al Kreplick > > Sr. Manufacturing Engineer > > Teradyne, Inc. > > 500 Riverpark Drive > > Mail Stop NR500 1-1 > > North Reading, MA 01864 > > Tel: 978-370-1726 > > Fax: 734-661-5352 > > Pager: 888-561-6485 > > > > --------------------------------------------------- > > Technet Mail List provided as a free service by IPC using LISTSERV 1.8e > > To unsubscribe, send a message to [log in to unmask] with following text > in > > the BODY (NOT the subject field): SIGNOFF Technet > > To temporarily halt or (re-start) delivery of Technet send e-mail to > > [log in to unmask]: SET Technet NOMAIL or (MAIL) > > To receive ONE mailing per day of all the posts: send e-mail to > > [log in to unmask]: SET Technet Digest > > Search the archives of previous posts at: > http://listserv.ipc.org/archives > > Please visit IPC web site http://www.ipc.org/html/forum.htm for > additional > > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 > > ext.5315 > > ----------------------------------------------------- > > --------------------------------------------------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8e > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt or (re-start) delivery of Technet send e-mail to > [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to > [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/html/forum.htm for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 > ext.5315 > ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------